78 lines
2.2 KiB
C++
78 lines
2.2 KiB
C++
/*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUvalue_t WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Copyright 2012-2015 Danny Robson <danny@nerdcruft.net>
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*/
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#ifdef __UTIL_NOISE_FRACTAL_FBM_IPP
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#error
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#endif
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#define __UTIL_NOISE_FRACTAL_FBM_IPP
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#include "../../debug.hpp"
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namespace util { namespace noise { namespace fractal {
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///////////////////////////////////////////////////////////////////////////
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template <class B>
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fbm<B>::fbm (seed_t _seed,
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unsigned _octaves,
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value_t _H,
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value_t _frequency,
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value_t _lacunarity,
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value_t _amplitude,
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value_t _gain):
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base<B> (_seed,
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_octaves,
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_H,
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_frequency,
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_lacunarity,
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_amplitude,
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_gain)
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{ ; }
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//-------------------------------------------------------------------------
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template <class B>
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fbm<B>::fbm (seed_t _seed):
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fbm<B> (_seed,
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DEFAULT_OCTAVES,
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DEFAULT_H,
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DEFAULT_FREQUENCY,
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DEFAULT_LACUNARITY,
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DEFAULT_AMPLITUDE,
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DEFAULT_GAIN)
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{ ; }
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///////////////////////////////////////////////////////////////////////////
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template <class B>
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typename fbm<B>::value_t
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fbm<B>::operator() (point_t p) const noexcept
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{
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value_t total = 0;
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value_t scale = this->m_invAH;
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p *= this->m_frequency;
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for (size_t i = 0; i < this->m_octaves; ++i) {
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total += this->m_basis (p) * scale;
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p += PI<value_t>;
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p *= this->m_lacunarity;
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scale *= this->m_invGH;
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}
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return total;
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}
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} } }
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